Hunting Dragons

Keychains of dragons are easily to find. Just stop in every souvenir shop in BCN and you will find them in several shapes and colors. I got mines just strolling  Las Ramblas, and stopping by newspaper kiosks. Some of them have a sign with a 3x10 euros offer. Others don't have it. So I'm not sure all kiosks have the same offer.

Also keychains can be found at the Charms market.

But more difficult can be finding a keychain with your name. Every Sunday and holiday days there are market stalls at the end of Las Ramblas, close to Colon monument. One of them sells rings, keychains and other things to be engraved with your name.